Cutler-Hammer D320 PLC, Руководство пользователя

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150
D320 PLC User's Manual
Special Instruction Details
Instruction
Mnemonic Refresh External Input and
Output
Range
■
Bit
Word
INPR
OUTR INPR: Refresh external input
OUTR: Refresh external output
Double words
Ladder
INPR: Immediately update the state of an external input signal during
program execution.
OUTR: Immediately update the state of an external output signal
during program execution.
Ch: The external input/output address (0 to 127).
Description
1. Refreshes the input/output data for the external I/O module at register address Ch.
2. These instructions are used when it is necessary to provide high-speed input and output
updates without limiting the size and length of the PLC program.
3. Under normal operation, the external inputs are read before the execution of the control
program, and the external outputs are updated at the end of the control program. The INPR
instruction is used to provide immediate input from the external input modules at any point
inside the control program without waiting for the end of the scan. Likewise, the OUTR
instruction allows the user to immediately update the state of an external output module at any
point in the program.
4. This operation will occur on every scan for which the input condition is true (On). To perform
the operation only on a change of input condition, use the rising/falling edge contact.
INPR
Ch =
OUTR
Ch =
R
R